What you need to know for the week of Aug. 12-19

I-5 Lynnwood

• Contractor crews working for Sound Transit will reduce southbound I-5 to two lanes between 44th Avenue West and 220th Street Southwest beginning at 9 p.m. Friday, Aug. 16. All lanes will reopen by 9 a.m. Saturday, Aug. 17. 
  • 44th Avenue West on-ramp to southbound I-5 will close from 10 p.m. to 7 a.m. 
  • 220th Avenue Southwest on-ramp to southbound I-5 will close from 9 p.m. to 7 a.m. 

I-5 Ship Canal Bridge

• Maintenance crews will reduce southbound I-5 on the Ship Canal Bridge to two lanes from 10 p.m. to 9 a.m. nightly on Friday, Aug. 16, and Saturday, Aug. 17.
  • The Northeast 45th Street on-ramp to southbound I-5 will be closed with a signed detour. 

I-405 Downtown Bellevue

• Sound Transit contractor crews will close the following from 10 p.m. Friday, Aug. 16, to 11:59 p.m. Saturday, Aug. 17:
  • The northbound I-405 off-ramp to Northeast 4th Street
  • The Northeast 4th Street on-ramp to northbound I-405
• Sound Transit contractor crews will close the following from 11:59 p.m. Saturday, Aug. 17, to 5 a.m. Monday, Aug. 19:
  • Northbound I-405 between Main Street and Northeast 10th Street
  • The northbound I-405 HOV off-ramp and the southbound HOV on-ramp to and from Northeast 6th Street
  • The Northeast 4th Street on-ramp to northbound I-405

SR 99 Aurora Bridge Seattle

• Lane reductions on the SR 99 Aurora bridge scheduled from 8 p.m. Friday, Aug. 16, to 5 a.m. Monday, Aug. 19. This work is weather-dependent. 

SR 99 Tunnel Seattle

• All lanes of the southbound SR 99 tunnel will close from 10 p.m. Friday, Aug. 16, to 8 a.m. Saturday, Aug. 17, for maintenance. 

I-90 Floating Bridge

• All lanes of eastbound I-90 will close between I-5 in Seattle and Island Crest Way on Mercer Island from 10 p.m. Saturday, Aug. 17, to 5 a.m. Sunday, Aug. 18, for maintenance.

I-90 Snoqualmie Pass

• Construction and maintenance work is taking place on I-90 this summer between North Bend and Vantage, which could add extra time to your travels. Know before you go by planning your trip in advance.

Construction closure information

• Visit our construction webpage for a list of highway closures happening near you.

Busy Traffic Weekend, Aug. 16-19

• SR 99 Aurora Bridge: One lane in each direction; weather-dependent work from 7 p.m. Friday, Aug. 16, to 5 a.m. Monday, Aug. 19.
• Seattle Hempfest: Friday, Aug. 16, to Sunday, Aug. 18, at Myrtle Edwards Park
• Southbound SR 99 tunnel maintenance closure: From 10 p.m. Friday, Aug. 16, to 8 a.m. Saturday, Aug. 17
• Tour de Whidbey Bike Ride: Starts at 6 a.m. Saturday, Aug. 17, in Coupeville
• Northwest Washington Fair: Friday, Aug. 16, to Saturday, Aug. 17, in Lynden
• Southbound I-5 Ship Canal Bridge maintenance: Lane reductions at the Ship Canal Bridge from 10 p.m. to 9 a.m. nightly from Friday, Aug. 16, to Sunday, Aug. 18
• Northbound I-405 Sound Transit closures: At Northeast 6th Street in Bellevue from 10 p.m. Friday, Aug. 16, to 5 a.m. Monday, Aug. 19
• Eastbound I-90 maint. closure: Between I-5 and Island Crest Way from 10 p.m. Saturday, Aug. 17, and 5 a.m. Sunday, Aug. 18
• Southbound I-5 traffic switch: To new alignment at SR 16 in Tacoma; weather-dependent work from 10 p.m. Saturday, Aug. 17, to 10 a.m. Sunday, Aug. 18
• Final Move-in Weekend at WSU: Prepare for increased traffic heading to Pullman